The Blackburn(R) Dayblazer 400 Front & Click USB Rear Light Combo is the perfect light set to keep you safe as you ride. The Dayblazer 400 features the BLITZ Daytime Running Mode, versatile mounting options, and excellent side visibility, while the Click USB rear light packs 20 lumens of light. FEATURES: BLITZ Mode for the front of your bike to make sure you are seen day or night Total Internal Reflection design TIR Lens Technology focuses the light beam with a hot center and cool edges so riders can clearly see Angle Adjustment: Features unlimited azimuth adjustment so you can always fine-tune the angle of your light beam Excellent Side Visibility: Great for cross-traffic situations LED fuel gauge / charge indicator: Small, built-in LED light to indicate battery level